Good Morning,
Short-term effects of alcohol on the human body can take many forms. The drug alcohol, specifically ethanol, is a central nervous system depressant with a range of side effects.
Most people drink alcohol for the effects they have on one's mood. I am not sure how you could drink alcohol "without noticing the relaxing effect it has".
Perhaps another member has some input that will help you out more then I have.
Kindly,
Kitt